
/* 版心 */
.wrapper {
    width: auto;

    margin: 0 auto;
}

/* 头部 */
.header {
    height: 70px;
    background-color:rgb(239, 247, 247);
  
}

h1 {
    float: left;
}

/* 导航 */
#nav {
    float: left;
    
    margin-left: 20px;
    height: 70px;
}
#nav ul{
    margin-left: 70px;

}
#nav li {
    float: left;
    margin-right: 26px;
}

#nav li a {
    /* 显示方式为块 */
    display: block;
    padding: 0 9px;
    height: 70px;
    line-height: 70px;
    /* border-bottom: 2px solid #00a4ff; */

    font-size: 18px;
    color: #050505;
}

#nav li a:hover {
    border-bottom: 2px solid #00a4ff;
}
#nav li:nth-child(7),
#nav li:nth-child(8),
#nav li:nth-child(9),
#nav li:nth-child(10),
#nav li:nth-child(11),
#nav li:nth-child(12):hover
{
	border-bottom: none;
}

/* 搜索 */
.search {
    float: left;
    margin-top: 20px;
    margin-left: 10px;
    width: 250px;
    height: 40px;
    border: 1px solid #00a4ff;
}

.search input {
    float: left;
    padding: 10px;
    /* 左右加一起的尺寸要小于等于410 */
    width: 205px;
    height: 38px;
    border: 0;
    
}

/* 控制placeholder的样式 */
.search input::placeholder {
    font-size: 14px;
    color: #939090;
}

.search button {
    float: left;
    
    width: 43px;
    height: 37px;
    /* background-image: url(../image/btn.png); */
    border: 0;
}

.user {
    float: left;
    margin-left: 25px;
    margin-top: 15px;
    height: 42px;
    line-height: 42px;
}
.user img {
    /* 调节图片垂直对齐方式, middle:居中 */
    vertical-align: middle;
}
.user #dl {
  margin-top: 5px;
  width: 70px;
  height: 43px;}